diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/tlbflush.h | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h index b149cf9f91bc..e8153c16fcdf 100644 --- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -351,14 +351,14 @@ static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch) * entries one by one at the granularity of 'stride'. If the TLB * range ops are supported, then: * - * 1. If 'pages' is odd, flush the first page through non-range - * operations; + * 1. The minimum range granularity is decided by 'scale', so multiple range + * TLBI operations may be required. Start from scale = 3, flush the largest + * possible number of pages ((num+1)*2^(5*scale+1)) that fit into the + * requested range, then decrement scale and continue until one or zero pages + * are left. * - * 2. For remaining pages: the minimum range granularity is decided - * by 'scale', so multiple range TLBI operations may be required. - * Start from scale = 0, flush the corresponding number of pages - * ((num+1)*2^(5*scale+1) starting from 'addr'), then increase it - * until no pages left. + * 2. If there is 1 page remaining, flush it through non-range operations. Range + * operations can only span an even number of pages. * * Note that certain ranges can be represented by either num = 31 and * scale or num = 0 and scale + 1. The loop below favours the latter @@ -368,12 +368,12 @@ static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch) asid, tlb_level, tlbi_user) \ do { \ int num = 0; \ - int scale = 0; \ + int scale = 3; \ unsigned long addr; \ \ while (pages > 0) { \ if (!system_supports_tlb_range() || \ - pages % 2 == 1) { \ + pages == 1) { \ addr = __TLBI_VADDR(start, asid); \ __tlbi_level(op, addr, tlb_level); \ if (tlbi_user) \ @@ -393,7 +393,7 @@ do { \ start += __TLBI_RANGE_PAGES(num, scale) << PAGE_SHIFT; \ pages -= __TLBI_RANGE_PAGES(num, scale); \ } \ - scale++; \ + scale--; \ } \ } while (0) |